Method for processing cylinder periphery, processes for producing development roller and photoconductor drum, and development roller and photoconductor drum

ABSTRACT

To provide a method for processing cylinder peripheries, capable of highly precise, stable transfer; a process for producing a development roller and a photoconductor drum; and the development roller and the photoconductor drum produced by the process. Asperities formed on a die are transferred to a metallic glass film formed on the periphery of a cylindrical column-shaped or cylindrical tube-shaped core of a roller by: heating the metallic glass film to turn into a viscous fluid; and rotating or rolling the roller while the metallic glass film is pressed against the die having the asperities. The metallic glass film is formed by, for example, thermal-spraying a metallic glass in a liquid state onto the periphery of the core.

The entire disclosures of Japanese Patent Application Nos. 2003-392032filed Nov. 21, 2003 and 2004-295773 filed Oct. 8, 2004 are herebyincorporated by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a method for processing the peripheryof various types of rollers used in copying machines, printers, and thelike, such as photoconductor drums and development rollers, process forproducing a development roller and a photoconductor drum, and thedevelopment roller and the photoconductor drum.

2. Description of the Related Art

Copying machines and printers use a laser beam as writing light to formelectrostatic latent images on the surfaces of their photoconductordrums. A photoconductor drum includes a conductive layer, an underlayer,a charge generation layer, a charge transport layer, and so forth, inthat order, on a base material. In the photoconductor drum, a laserbeam, which is coherent monochromatic light, emitted to the surface ofthe photoconductor drum reflects from each interface between the layersand the interface between the base material and the conductive layer,and the reflected rays can interfere with one another. This interferenceappears as so-called interference fringes on formed visible images, andthus causes image failure. The interference particularly affects theformation of high-gradient halftone images. In particular, along-wavelength semiconductor laser beam is liable to cause interferencebecause the longer wavelength the semiconductor laser beam has, the lessthe absorption of the laser beam by the photosensitive layer is. Inorder to overcome such a disadvantaged, the periphery of the basematerial is processed to have microscopic asperities. For example, thereis a method that a pattern of microscopic asperities is transferred tothe periphery of a cylindrical metal tube or cylindrical metal columnwith the use of hardened forging rolls whose peripheries are sandblastedto pattern microscopic asperities, by pressing the roll surfaces on anobject, that is, the cylindrical metal tube or cylindrical metal column,and rolling the rolls on the object.

An example of such a method is disclosed in Japanese Unexamined PatentApplication Publication No. 10-104988.

In the above-described processing method, the periphery of the metalcylinder is provided with asperities of several micrometers by forging.Unfortunately, the forging requires considerable pressure, and forgingapparatuses are inevitably upsized, accordingly. Microscopic asperitiesas small as several micrometers are difficult to transfer in the sameshape as the pattern of the forging die. In order to transfer a desiredpattern precisely, it is necessary to appropriately select the shape ofthe die, processing conditions, or the like through a trial and errorprocess. It is thus difficult to provide the same shape constantly.Furthermore, although the forging die is hardened, it is worn away withhard objects made of metal, and its lifetime is short accordingly.

SUMMARY OF THE INVENTION

The present invention is intended to overcome the above-describeddisadvantage, and the object of the present invention is to provide: amethod for processing cylinder peripheries, capable of highly precise,stable transfer; a process for producing a development roller and aphotoconductor drum; and the development roller and the photoconductordrum produced by the process.

In a method for processing cylinder peripheries according to the presentinvention, asperities formed on a die are transferred to a metallicglass film formed on the periphery of a cylindrical column-shaped orcylindrical tube-shaped core of a roller by: heating the metallic glassfilm to turn into a viscous fluid; and rotating or rolling the rollerwhile the metallic glass film is pressed against the die havingasperities.

Since the metallic glass film formed on the periphery of the cylindricalcolumn-shaped or cylindrical tube-shaped core is turned into a viscousfluid, and the asperities of the die are transferred to the metallicglass film by rotating or rolling the roller while the roller is pressedagainst the die, highly precise, stable transfer can be achieved. Sinceit suffices that the die has a certain degree of hardness, the inventionextends the range of choice in the metal used as the die. Accordingly,the die can be prepared by many processing methods, and thus the rangeof choice in producing the die extends. Also, since the pressure of theroller on the die is much smaller than that of conventional forging, thewear of the die is reduced, and the lifetime of the die increasesaccordingly. Thus, energy saving and downsizing of the manufacturingapparatus can be achieved. Furthermore, since the metallic glass is ofamorphous metal, nanometer-level transfer can be achieved, and thusnanoscopic asperities can be accurately transferred.

The foregoing method may include the step of forming the metallic glassfilm on the periphery of the core. In this instance, preferably, ametallic glass in a liquid form is thermal-sprayed on the periphery ofthe core, thereby forming the metallic glass film. Since the metallicglass film is formed by thermal spraying, processing time can bereduced.

Preferably, the thermal spraying is performed in an inert gasatmosphere. Since the thermal spraying is performed in an inert gasatmosphere, the metallic glass is prevented from oxidizing.

The metallic glass contains at least one group selected from among Zr,Ni, Al, Pd, Mg, Fe, Co, and Ti groups. Thus, various types of materialcan be used as the metallic glass, and thus the range of choicesextends. For example, the material of the metallic glass can be selectedaccording to the material of the core.

Preferably, in the core, at least the periphery is made of metal,ceramic, or plastic. Ceramic and plastic can be used as the material ofthe core, in addition to metal. Use of plastic can achieve light weightof the core.

One or both of the core and the die may be heated to heat the metallicglass film. Specifically, in order to turn the metallic glass film intoa viscous fluid, at least either the core or the die may be heated.

The heating may be performed by using infrared rays, a heater, or afurnace.

In the above-described method, the die may be in a plate form, and theasperities on the surface of the die may be transferred to the surfaceof the roller by rotating or rolling the roller while the roller ispressed against the die.

The asperities on the surfaces of two plate-like dies may be transferredto the surface of the roller by rotating or rolling the roller with theroller pinched between the two dies.

Alternatively, the die may be in a cylindrical column or cylindricaltube form, and the asperities on the surface of the die may betransferred to the surface of the roller by rotating both the roller andthe die while the roller is pressed against the die.

The asperities on the surfaces of two cylindrical column-shaped orcylindrical tube-shaped dies may be transferred to the surface of theroller by rotating both the roller and the dies with the roller pinchedbetween the two dies.

Also, the die may be in a disk form, and the asperities on the side wallof the die may be transferred to the surface of the roller by rotatingboth the roller and the die while the roller is pressed against the sidewall of the die.

The asperities on the side walls of two disk-shaped dies may betransferred to the surface of the roller by rotating both the roller andthe dies with the roller pinched between the two dies.

A process for producing a development roller according to the presentinvention includes the step of processing the periphery of thedevelopment roller by the method for processing cylinder peripheries.Thus, the periphery of the development roller is appropriately processedto eliminate causes of image failure.

A process for producing a photoconductor drum according to the presentinvention includes the step of processing the periphery of thephotoconductor drum by the method for processing cylinder peripheries.Thus, the periphery of the photoconductor drum is appropriatelyprocessed to eliminate causes of image failure.

A development roller according to the present invention is produced bythe foregoing production process of a development roller.

A photoconductor drum according to the present invention is produced bythe foregoing production process of a photoconductor drum.

The development roller according to the present invention includes acylindrical column-shaped or cylindrical tube-shaped core and a metallicglass film formed on the periphery of the core. The metallic glass hasasperities on its surface.

The photoconductor drum according to the present invention includes acylindrical column-shaped or cylindrical tube-shaped core and a metallicglass film formed on the periphery of the core. The metallic glass hasasperities on its surface.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a cylindrical column-shaped orcylindrical tube-shaped core.

FIG. 2 is a representation of thermal spraying in which a metallic glassliquid is thermal-sprayed onto a core from a nozzle.

FIG. 3 is an enlarged view of thermal spraying in which a metallic glassliquid is thermal-sprayed onto a core from a nozzle.

FIG. 4 is a perspective view of a plate forming a die.

FIG. 5 is a plan view of forming asperities on the surface of aplate-like die.

FIG. 6 is a front view of forming asperities on the surface of aplate-like die.

FIG. 7 is an enlarged sectional view of a vicinity of the surface of adie.

FIG. 8 is a representation of the step of heating a die.

FIG. 9 is a representation of transfer to a roller with a plate-likedie.

FIG. 10 is an enlarged sectional view of a vicinity of the surface of adevelopment roller.

FIG. 11 is a representation of transfer to a roller with two plate-likedies.

FIG. 12 is a representation of transfer to a roller with a cylindricalcolumn-shaped die.

FIG. 13 is a representation of transfer to a roller with two cylindricalcolumn-shaped dies.

FIG. 14 is a representation of transfer to a roller with a disk-shapeddie.

FIG. 15 is a representation of transfer to a roller with two disk-shapeddies.

FIG. 16 is a representation of forming asperities on the surface of acylindrical column-shaped die.

FIG. 17 is a representation of forming asperities on the surface of adisk-shaped die.

FIG. 18 is a representation of an example of the present invention.

FIG. 19 is a property diagram resulting from the example of the presentinvention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Methods for processing the surface (periphery) of a roller according toembodiments of the present invention will now be described.

Embodiment 1

The present embodiment describes a process for producing a developmentroller used in a printer, in sections: (a) step of forming a metallicglass film on the periphery of a core serving as a roller; (b) step ofproducing a die; (c) step of heating the die; and (d) step of transfer.

(a) Step of Forming a Metallic Glass Film on the Periphery of a CoreServing as a Roller:

FIGS. 1, 2, and 3 show the step of forming a metallic glass film on theperiphery of a core serving as a roller. FIG. 1 is a perspective view ofa cylindrical column-like or cylindrical tube-like core 10. FIG. 2 is arepresentation of thermal spraying in which a metallic glass 14 meltedinto liquid is sprayed onto the core 10 from a nozzle 12, and FIG. 3 isan enlarged view of the thermal spraying.

First, the cylindrical column-like or cylindrical tube-like core 10 isprepared as a base material of the development roller. The base material10 is made of, for example, aluminium, and, in the present embodiment,has a diameter of about 18 mm. The liquid of metallic glass 14 issprayed from the nozzle 12 onto the periphery of the rotating core 10with a temperature of about room temperature while the nozzle 12 ismoved in the direction of the shaft of the core 10, thus forming ametallic glass film 16 on the periphery of the core 10. Spraying theliquid of metallic glass 14 is herein referred to as thermal spraying.The metallic glass 14 landed on the periphery of the core roller 10 bythermal spraying is rapidly cooled and solidified in an amorphous stateto adhere to the periphery. Thus, a roller 18 is produced which has themetallic glass film 16 on the periphery of the core 10 Any technique canbe applied to the thermal spraying, but preferably, it is performed inan atmosphere of inert gas (such as N₂ or Ar) so as to prevent oxidationof the metallic glass 14 and the metallic glass film 16.

The thickness of the metallic glass film 16 is set according to thedepth of the asperities formed in the metallic glass film 16. In thepresent embodiment, it is set at, for example, about 50 μm. Theperiphery of the roller 18 to which the metallic glass 14 wasthermal-sprayed often has asperities or very small holes. Accordingly,the periphery is preferably grinded or polished to increase theroundness and to make smooth the surface of the metallic glass film 16.

If a roller previously provided with the metallic glass film 16 is used,step (a) is not necessary.

While metallic glass is an amorphous metal containing a Zr, Ni, Al, Pd,Mg, Fe, Co, or Ti group or the like and is thus metal, as well known, itturns into viscous fluid at a temperature of glass transitiontemperature or higher, like oxide glass. The present invention utilizesthis property. Examples of the metallic glass include Zr₅₅Al₁₀Cu₃₀Ni₅,Pd₄₀Cu₃₀Ni₁₀P₂₀ (numerals represent atomic ratios), and other alloys,such as Pd—Ni—Fe—P, Pd—Cu—B—Si, Al—Cs—Ni, and Ni—Zr—Ti—Sn—Si. In thepresent embodiment, Zr₅₅Al₁₀Cu₃₀Ni₅ is used as the metallic glass 14.

(b) Step of Producing a Die:

FIGS. 4, 5, and 6 shows the step of producing a die used for transfer.FIG. 4 is a perspective view of a plate (for example SUS 316) forforming the die, and FIGS. 5 and 6 are representations of the platewhich is being processed. First, a plate (plate-like base) 20 isprepared as the base of the die. Abrasive grains 24 are jetted from anozzle 22 over the entire surface of the plate 20 to sandblast thesurface of the plate 20, thereby forming a plurality of microscopicasperities 26 a on its surface. Thus, plate-like die 26 is prepared.FIG. 7 is an enlarged sectional view of the plate-like die 26. Theabove-described sandblast treatment provides the asperities 26 a havingan average surface roughness Rz of 6.0 to 6.5 μm.

It is efficient to prepare the die having the plurality of microscopicasperities in advance. Thus, the step of producing the die is generallynot included in a process of transfer to the metallic glass film 16 ofthe roller 18 (this applies to other embodiments).

(c) Step of Heating the Die:

FIG. 8 is a representation of the step of heating the die 26. The die 26is placed on a heater 28 and heated to a temperature of, for example,460 to 470° C. The heating of the die 26 is performed in order to turnthe metallic glass film 16 into a viscous fluid by heating the roller 18(particularly the metallic glass film 16) with the heated die 26 to atemperature of glass transition temperature (Tg) or more in the step oftransfer shown in FIG. 9, described later. The glass transitiontemperature (Tg) depends on the constituents of the metallic glass, andthe heating temperature of the die 26 is set according to the metallicglass used.

(d) Step of Transfer

FIG. 9 is a representation of the step of transferring the asperities 26a of the die 26 to the roller 18 prepared as above. The roller 18 ismoved down to press the die 26 which is heated to a temperature in theforegoing range with the heater 28. The pressure at this point is about100 MP, for instance. The roller 18 is rolled on the die 26 whilepressing the die. In this instance, the moving speed of the rolling is,for example, about 30 mm/min. Then, at the time when the roller 18 makesone turn, the pressure is released and the roller 26 is taken off fromthe die 26. Thus, the asperities 26 a (or asperity pattern) on thesurface of the die 26 of the roller 18 are transferred to the metallicglass film 16 to produce a development roller 30.

FIG. 10 is an enlarged sectional view of the vicinity of the surface ofthe development roller 30 produced as above. The asperities 26 a of thedie 26 are transferred to the metallic glass film 16 of the developmentroller 30, and thus asperities 30 a (or an asperity pattern) are formed.The Rz of the asperities 30 a is, for example, 6.0 to 6.5 μm; hence, theasperities 20 a of the die 26 have been precisely transferred. Theprecision of the transfer will be described in detail in an examplelater.

As described above, in Embodiment 1, the roller 18 having the metallicglass film 16 on its periphery is pressed against the heated plate-likedie 26, and the asperities 26 a of the die 26 are transferred to themetallic glass film 16 turned into a viscous fluid by being heated withthe heated die 26. Thus, Embodiment 1 can achieve highly precise andstable transfer. Since it suffices that the die has a certain degree ofhardness, the embodiment extends the range of choice in the metal usedas the die. Accordingly, the die can be prepared by many processingmethods, and thus the range of choice in producing the die extends.Also, since the pressure of the roller 18 on the die 26 is much lowerthan that of conventional forging, the wear of the die 26 is reduced,and the lifetime of the die increases accordingly. In addition, sincethe pressure is low, energy saving and downsizing of the manufacturingapparatus can be achieved. Furthermore, since the metallic glass is ofamorphous metal, nanometer-level transfer can be achieved, and thusnanoscopic asperities of the die 26 can be accurately transferred.

Although FIG. 9 shows an example using the single plate-like die 26,transfer can be performed with two plate-like dies 26. For example, theroller 18 is pinched between two plate-like dies 26, and the roller 18is rotated by moving the dies 26 as shown in FIG. 11. Thus, theasperities on the surfaces of the dies 26 are transferred to themetallic glass film 16 on the surface of the roller 18. In thisinstance, the asperities of the dies are transferred to the entireperiphery of the roller 18 by only a half-turn of the roller 18. Onlyeither the dies 26 may be moved, or both the dies may be moved.

Embodiment 2

While Embodiment 1 transfers asperities to the metallic glass film 16 ofthe roller 18 with the plate-like die 26, a cylindrical column-shaped orcylindrical tube-shaped die 26A can be used to transfer microscopicasperities. The cylindrical column-shaped or cylindrical tube-shaped die26A can be produced through the method shown in FIG. 6. Specifically,abrasive grains 24 are jetted from a nozzle 22 onto the surface of acylindrical column-shaped or cylindrical tube-shaped base 20A made ofSUS 316 or the like to sandblast the surface of the base 20A, therebyforming a plurality of microscopic asperities on its surface. Thus,cylindrical column-shaped or cylindrical tube-shaped die 26A used fortransfer is prepared, as shown in FIG. 16. FIG. 16(a) is a front viewand FIG. 16(b) is a side view.

FIG. 12 shows representations of transfer of asperities to the metallicglass film 16 formed on the surface of the roller 18, using the singlecylindrical column-shaped die 26A. FIG. 12(a) is a front view and FIG.12(b) is a side view. In the present embodiment, the roller 18 and thedie 26A, which is heated, are rotated with the roller 18 pressed againstthe die 26A at a pressure of, for example, about 100 MP. Thus, theasperities of the surface of the die 26A are transferred to the metallicglass film 16 turned into fluid on the surface of the roller 18.

FIG. 13 shows representations of transfer of asperities to the metallicglass film 16 formed on the surface of the roller 18, using twocylindrical column-shaped dies 26A. FIG. 13(a) is a front view and FIG.13(b) is a side view. In this case, both the roller 18 and the dies 26Aare rotated with the roller 18 pinched between the two dies 26A at apressure of, for example, about 100 MP. Thus, the asperities of thesurfaces of the dies 26A are transferred to the metallic glass film 16turned into fluid on the surface of the roller 18.

As described above, microscopic asperities can be transferred to themetallic glass film 16 on the surface of the roller 18 with use of oneor two cylindrical column-shaped or cylindrical tube-shaped dies 26A,and thus substantially the same effect as in Embodiment 1 is produced.

Embodiment 3

A method will be described here which performs transfer to the metallicglass film 16 on the surface of the roller 18 with use of a disk-shapeddie 26B, instead of the pate-like die 26 or the cylindricalcolumn-shaped or cylindrical tube-shaped die 26A. The disk-shaped die26B can be produced through the method shown in FIG. 6. Specifically,abrasive grains 24 are jetted from a nozzle 22 onto the side wall of adisk-shaped base 20B made of SUS 316 or the like to sandblast the sidewall of the base 20B, thereby forming a plurality of microscopicasperities on the side wall. Thus, a disk-shaped die 26B used fortransfer is prepared, as shown in FIG. 17. FIG. 17(a) is a front viewand FIG. 17(b) is a side view.

FIG. 14 shows representations of transfer of asperities to the metallicglass film 16 formed on the surface of the roller 18, using adisk-shaped die 26B. FIG. 14(a) is a front view and FIG. 14(b) is a sideview. In this case, the roller 18 and the die 26B, which is heated, arerotated while the roller 18 and the side wall of the die 26B are pressedat a pressure of about 100 MP. Thus, the asperities of the side wall ofthe die 26B are transferred to the metallic glass film 16 turned intofluid on the surface of the roller 18.

FIG. 15 shows representations of transfer of asperities to the metallicglass film 16 formed on the surface of the roller 18, using twodisk-shaped dies 26B. FIG. 15(a) is a front view and FIG. 15(b) is aside view. In this case, both the roller 18 and the dies 26A are rotatedwith the roller 18 pinched between the two dies 26A at a pressure of,for example, about 100 MP. Thus, the asperities of the side walls of thedies 26B are transferred to the metallic glass film 16 turned into fluidon the surface of the roller 18.

For transfer over the entire periphery of the roller 18, in FIGS. 14 and15, one or both the roller 18 and the disk-shaped die 26B are moved inthe direction designated by the arrow.

As described above, microscopic asperities can be transferred to themetallic glass film 16 on the surface of the roller 18 with use of oneor two disk-shaped dies 26B, and thus substantially the same effect asin Embodiment 1 is produced.

Although, in the above-described embodiments, the core 10 of the roller18 is made of aluminium, it may be made of other metals, or ceramic orplastic. Plastic can achieve light weight and lead to reducedoperational power. If plastic is used, the periphery of the core may beplated in order to enhance the adhesion to the metallic glass film 16.

In the above-described embodiments, in order to turn the metallic glassfilm 16 into a viscous fluid, the die 26, 26A, or 26B heated with aheater 28 heats the metallic glass film 16. Alternatively, the metallicglass film 16 may be heated by heating both the roller 18 and the die26, 26A, or 26B with infrared rays or a furnace. Only the roller 18 maybe heated with a hater to turn the metallic glass film 16 into a viscousfluid.

The die may be made of, for example, SKD, SKH, super-hardwood, quartzglass, amorphous carbon, Fotoceram, or rock crystal, instead of steel.Since the die does not need high strength, single-crystal silicon may beused, for example. A single-crystal die can provide a neat pattern byetching. For example, V-shaped grooves at regular intervals and varioustypes of patterns, such as a pyramidal pattern, can be formed. By usingthe die having such a pattern, a neat, single-size, regular-intervalpattern can be precisely transferred to the metallic glass film 16.

In addition to the above listed Zr₅₅Al₁₀Cu₃₀Ni₅, usable metallic glassesfor the metallic glass film 16 include other amorphous metals containingat least one group of Ni, Al, Pd, Mg, Fe, Co, Ti, and the like.

While, in the above-described embodiments, the metallic glass film 16 isformed by thermal-spraying of the metallic glass 14, the metallic glassfilm 16 may be formed by vapor deposition or sputtering.

Also, while the above-described embodiment produces a developmentroller, photoconductor drums, which have the same structure as thedevelopment roller, may be produced in the same manner.

Furthermore, the above-described production method can be applied to themanufacture of anilox rollers of laser printers.

EXAMPLES

FIGS. 18(a) and 18(b) are representations of an example according toEmbodiment 1 of the present invention. As shown in FIG. 18(a), siliconis used as a constituent of a plate-like die 26, and a pattern(asperities) of V-shaped grooves with a width of 8.18 μm and a P (pitch)of 10 μm is prepared. Then, a roller 18 is pressed against the die 26,as shown in FIG. 18(b). In this example, the metallic glass film 16 ofthe roller 18 was formed of a metallic glass Zr₅₅Al₁₀Cu₃₀Ni₅ at aheating temperature of 450° C. under a pressure of 60 MPa. The depth ofthe grooves of the die 26 is represented by h1; the height of thetransferred projections on the metallic glass film 16 of the roller 18,by h2; and the height ratio, by h2/h1. A large height ratio (h2/h1)means a high transfer ratio.

FIG. 19 is a property diagram showing the relationship between theprocessing time and the height ratio (h2/h1), and shows that thetransfer ratio reaches almost 100% in a processing time of about 5minutes.

1. A method for processing cylinder peripheries characterized in thatasperities formed on a die are transferred to a metallic glass filmformed on the periphery of a cylindrical column-shaped or cylindricaltube-shaped core of a roller by: heating the metallic glass film to turninto a viscous fluid; and rotating or rolling the roller while themetallic glass film is pressed against the die having the asperities. 2.The method for processing cylinder peripheries according to claim 1, themethod includes the step of forming the metallic glass film on theperiphery of the core.
 3. The method for processing cylinder peripheriesaccording to claim 2, wherein a metallic glass in a liquid form isthermal-sprayed on the periphery of the core, thereby forming themetallic glass film.
 4. The method for processing cylinder peripheriesaccording to claim 3, wherein the thermal spraying is performed in aninert gas atmosphere.
 5. The method for processing cylinder peripheriesaccording to claim 4, wherein the metallic glass contains at least onegroup selected from among Zr, Ni, Al, Pd, Mg, Fe, Co, and Ti groups. 6.The method for processing cylinder peripheries according to claim 5,wherein, in the core, at least the periphery thereof comprises a metalor a plastic.
 7. The method for processing cylinder peripheriesaccording to claim 6, wherein at least either the core or the die isheated to heat the metallic glass film.
 8. The method form processingcylinder peripheries according to claim 7, wherein the heating isperformed by using any one of infrared rays, a hater, or a furnace. 9.The method for processing cylinder peripheries according to claim 8,wherein the die is in a plate form, and the asperities on the surface ofthe die are transferred to the surface of the roller by rotating orrolling the roller while the roller is pressed against the die.
 10. Themethod for processing cylinder peripheries according to claim 8, whereinthe die is in a plate form, and the asperities on the surfaces of twodies are transferred to the surface of the roller by rotating or rollingthe roller with the roller pinched between the dies.
 11. The method forprocessing cylinder peripheries according to claim 8, wherein the die isin a cylindrical column or cylindrical tube form, and the asperities onthe surface of the die are transferred to the surface of the roller byrotating both the roller and the die while the roller is pressed againstthe die.
 12. The method for processing cylinder peripheries according toclaim 8, wherein the die is in a cylindrical column or cylindrical tubeform, and the asperities on the surfaces of two dies are transferred tothe surface of the roller by rotating both the roller and the dies withthe roller pinched between the dies.
 13. The method for processingcylinder peripheries according to claim 8, wherein the die is in a diskform, and the asperities on the side wall of the die are transferred tothe surface of the roller by rotating both the roller and the die whilethe roller is pressed against the side wall of the die.
 14. The methodfor processing cylinder peripheries according to claim 8, wherein thedie is in a disk form, and the asperities on the side walls of two diesare transferred to the surface of the roller by rotating both the rollerand the dies with the roller pinched between the side walls of the dies.15. A process for producing a development roller, the process includingthe step of processing the periphery of the development roller by themethod for processing cylinder peripheries as set forth in claim
 1. 16.A process for producing a photoconductor drum, the process including thestep of processing the periphery of the photoconductor drum by themethod for processing cylinder peripheries as set forth in claim
 1. 17.A development roller produced by the process for producing a developmentroller as set forth in claim
 15. 18. A photoconductor drum produced bythe process for producing a photoconductor drum as set forth in claim16.
 19. A development roller comprising: a cylindrical column-shaped orcylindrical tube-shaped core: and a metallic glass film formed on theperiphery of the core, the metallic glass film having asperities on thesurface thereof.
 20. A photoconductor drum comprising: a cylindricalcolumn-shaped or cylindrical tube-shaped core: and a metallic glass filmformed on the periphery of the core, the metallic glass film havingasperities on the surface thereof.